scripts: kernel-doc: handle nested struct function arguments

Function arguments are different than usual ones. So, an
special logic is needed in order to handle such arguments
on nested structs.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

scripts/kernel-doc

@@ -1041,10 +1041,23 @@ sub dump_struct($$) {
 			$id =~ s/^\*+//;
 			foreach my $arg (split /;/, $content) {
 				next if ($arg =~ m/^\s*$/);
+				if ($arg =~ m/^([^\(]+\(\*?\s*)([\w\.]*)(\s*\).*)/) {
+					# pointer-to-function
+					my $type = $1;
+					my $name = $2;
+					my $extra = $3;
+					next if (!$name);
+					if ($id =~ m/^\s*$/) {
+						# anonymous struct/union
+						$newmember .= "$type$name$extra;";
+					} else {
+						$newmember .= "$type$id.$name$extra;";
+					}
+				} else {
 					my $type = $arg;
 					my $name = $arg;
 					$type =~ s/\s\S+$//;
-				$name =~ s/.*\s//;
+					$name =~ s/.*\s+//;
 					$name =~ s/[:\[].*//;
 					$name =~ s/^\*+//;
 					next if (($name =~ m/^\s*$/));
@@ -1055,6 +1068,7 @@ sub dump_struct($$) {
 						$newmember .= "$type $id.$name;";
 					}
 				}
+			}
 			$members =~ s/(struct|union)([^{};]+){([^{}]*)}([^{}\;]*)\;/$newmember/;
 			$cont = 1;
 		};
@@ -1250,7 +1264,7 @@ sub create_parameterlist($$$$) {
 	} elsif ($arg =~ m/\(.+\)\s*\(/) {
 	    # pointer-to-function
 	    $arg =~ tr/#/,/;
-	    $arg =~ m/[^\(]+\(\*?\s*(\w*)\s*\)/;
+	    $arg =~ m/[^\(]+\(\*?\s*([\w\.]*)\s*\)/;
 	    $param = $1;
 	    $type = $arg;
 	    $type =~ s/([^\(]+\(\*?)\s*$param/$1/;